HP Insight Control Performance Management 7.3 User Guide

SATA Drive Inventory

• Drive Information

Description of the drive, including size◦

◦ Hard drive model number

◦ Size of the drive as seen by the operating system

• Configuration Information

Summary of the drive configuration◦

◦ Name of the Smart Array controller to which it is attached

◦ Location of the hard drive in its enclosure

◦ Array in which the drive is configured

◦ SATA protocol negotiated for transfers between this drive and the disk controller

SAS Drives

The following information is provided for an SAS Drive.

SAS Drive Status

• Disk Read/Sec—Average number of reads from the selected SAS drive each second

• Disk Write/Sec—Average number of writes to the selected SAS drive each second

• Disk Read Mbytes/Sec—Average number of Megabytes of data read from the selected SAS

drive each second

• Disk Write Mbytes/Sec—Average number of Megabytes of data written to the selected SAS

drive each second

• Disk Millisecond/Read—Average time required to complete a read operation

• Disk Millisecond/Write—Average time required to complete a write operation

• Disk Queue Length—Average number of transfer requests (reads and writes) waiting to be

serviced by the SAS drive, including transfers currently being serviced and transfers waiting

for service, regardless of where the request is waiting (drive or controller)

Insight Control performance management uses a set of algorithms to determine the SAS drive status.

The Disk Queue Length is a primary parameter. However, when the value of the Disk Queue Length

exceeds the acceptable value, the Disk Reads/Sec and Disk Writes/Sec are examined to determine

whether read or write operations require most of the drive throughput. When combined with Disk

Millisecond/Read or Disk Millisecond/Write, performance management can determine if the

number of requests for the drive will exceed the capabilities of the drive.

SAS Drive Inventory